docs: def __compose(self):
  		""" Compose the message, pulling together body, attachments etc
  		"""
  		msg  = MIMEMultipart()
  		msg['Subject'] = self.config['shutit.core.alerting.emailer.subject']
  		msg['To']      = self.config['shutit.core.alerting.emailer.mailto']
  		msg['From']    = self.config['shutit.core.alerting.emailer.mailfrom']
  		# add the module's maintainer as a CC if configured
  		if self.config['shutit.core.alerting.emailer.mailto_maintainer']:
  			msg['Cc'] = self.config['shutit.core.alerting.emailer.maintainer']
  		if self.config['shutit.core.alerting.emailer.signature'] != '':
  			signature = '\n\n' + self.config['shutit.core.alerting.emailer.signature']
  		else:
  			signature = self.config['shutit.core.alerting.emailer.signature']
  		body = MIMEText('\n'.join(self.lines) + signature)
  		msg.attach(body)
  		for attach in self.attaches:
  			msg.attach(attach)
  		return msg